Hydrothermal synthesis of porous octahedral Cu microcrystals and their application as hydrogen peroxide sensors

The novel porous octahedral Cu microcrystals were synthesized successfully by a simple one‐step hydrothermal reduction method based on TEA technique. The X‐ray diffraction (XRD) patterns reveal that Cu microcrystals have octahedral crystalline phase and high purity. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies represent that Cu microcrystals have a porous structure on their surface and polycrystalline structure. The asprepared porous Cu structures exhibited good ectrocatalytic activity in response to H₂O₂ reduction and can be used as H₂O₂ sensor. Furthermore, the possible formation mechanism of the POCu was proposed.